Q: What are the factor combinations of the number 125,165,213?

 A:
Positive:   1 x 125165213179 x 699247673 x 1859811039 x 120467
Negative: -1 x -125165213-179 x -699247-673 x -185981-1039 x -120467


How do I find the factor combinations of the number 125,165,213?

Unfortunately, there's not simple formula to identifying all of the factors of a number and it can be a tedious process when trying to identify the divisors of larger numbers. To find the factor combinations of the number 125,165,213, it is easier to work with a table - it's called factoring from the outside in.

Outside in Factoring

We start by creating a table and writing 1 on the left side and then the number we're trying to find the factors for on the right side in a table. Then, below that, write the numbers as a negative as well.

1 125,165,213
-1 -125,165,213

Why are the negative numbers included?

When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 125,165,213.

Example:
1 x 125,165,213 = 125,165,213
and
-1 x -125,165,213 = 125,165,213
Notice both answers equal 125,165,213

With that explanation out of the way, let's continue. Next, we take the number 125,165,213 and divide it by 2:

125,165,213 ÷ 2 = 62,582,606.5

If the quotient is a whole number, then 2 and 62,582,606.5 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.

Here is what our table should look like at this step:

1 125,165,213
-1 -125,165,213

Now, we try dividing 125,165,213 by 3:

125,165,213 ÷ 3 = 41,721,737.6667

If the quotient is a whole number, then 3 and 41,721,737.6667 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.

Here is what our table should look like at this step:

1 125,165,213
-1 -125,165,213

Let's try dividing by 4:

125,165,213 ÷ 4 = 31,291,303.25

If the quotient is a whole number, then 4 and 31,291,303.25 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.

Here is what our table should look like at this step:

1 125,165,213
-1 125,165,213
Keep dividing by the next highest number until you cannot divide anymore.

If you did it right, you will end up with this table:

11796731,039120,467185,981699,247125,165,213
-1-179-673-1,039-120,467-185,981-699,247-125,165,213

More Examples

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